OpenAI delivered advanced ChatGPT reasoning models this month that are more capable than o1, but they also hallucinate more.

OpenAI has just given ChatGPT a massive boost with new o3 and o4-mini models that are available to use right now for Pro, ...

OpenAI is streamlining its AI model lineup, retiring popular models like GPT-4 and GPT-4.5, all in anticipation of the launch ...

With a ChatGPT Plus, Team or Enterprise account you now have access to 100 messages a week with the ChatGPT-o3 model and a ...

OpenAI unleashed a flurry of new ChatGPT variants over the week, each featuring interesting new features and very confusing ...

OpenAI's o3 and o4-mini models for ChatGPT have arrived.

OpenAI says its latest models, o3 and o4-mini, are its most powerful yet. However, research shows the models also hallucinate ...

The ability to recognize cloud types from photographs is a longstanding challenge, even for trained meteorologists. Yet in this study, the latest iteration of ChatGPT (o3-mini) demonstrated ...

However, according to OpenAI’s internal tests, these new o3 and o4-mini reasoning models also hallucinate significantly more ...

OpenAI's reasoning AI models are getting better, but their hallucinating isn't, according to benchmark results.

"How about we fix our model naming by this summer and everyone gets a few more months to make fun of us," OpenAI's Sam Altman ...

Both o3 and o4-mini models, released earlier this week, are only available to paying ChatGPT users at the moment.